Flow-regulating attachment for carburetors



Aug. 10 1926.

P. J. HALLORAN FLOW REGULATING ATTACHMENT FOR CARBURETORS Filed Oct. 25,. 1924 hereinafter described.

Patented Aug. 10, 1926.

UNITED STATES PATRICK J. H.AJZILORAIN, OF BOSTON, MASSACHUSETTS.

FLOW-REGULATING ATTACHMENT FOR CABBURETORS.

Application filed October 25, 1924. Serial 170. 745,882.

This invention relates to the carburetor of an internal combustion engine, associated, in a motor vehicle, with an intake manifold which draws an explosive mixture from the carburetor, the deliveringv end of the car buretor being secured by clamping means to the receiving end of the manifold.

The object of the invention is to provide a variable throat forming attachment, adapted to be interposed as a unit between said delivering and receiving ends, and to be secured by the usual securing means, connecting the carburetor with the manifold, the throat being always central with relation to the said delivering end, and variable in capacity by means operable from a dist-ant point by the operator of the vehicle.

Of the accompanying drawings forming a part of this specification Figure 1 is a side view of a flow-regulating attachment embodying the invention, showing the throat at its maximum enlargement.

Figure 2 is a view similar to Figure 1, showing the throat contracted, a portion of the holder being broken away.

Figure 3 is a section on line 33 of Fig- Figures 4 and 5 are fragmentary perspective views, showing respectively, portions of the segmental gear and annular adjuster Figure 6 is a fragmentary section 66 of Figure 3.

Figure 7 is a section on line 7-7 of Figure 1, and a plan view of parts below said line.

Figure 8 shows in side elevation, a carburetor, an intake manifold, and a flowregulating attachment embodying the invention.

Figure 9 is a section on line 9-9 of Figure 8.

The same reference characters indicate the same parts in all of the figures.

Figure 8 shows a carburetor a, havin at one end a flat-faced flange b, on whic is usually seated a complemental flat-faced flange c, on an intake manifold d, the flanges b and a being usually perforated to receive on line connecting bolts 7, havin clamping nuts g.

In the air inlet end 0 the carburetor is the usual butterfly valve 72., controlling the air which is drawn through the carburetor by the intake manifold, and is mixed with hydrocarbon vapor from the usual float chamber 71, containing gasolene. Usually the flow of the explosive mixture to the manifold is controlled by a second butterfly valve, similar to the valve 71..

In carrying out my invention I substitute for the second butterfly valve, a series of overlapping plates mounted in a holder,

which is interposed between the flanges. b and c, said plates collectively forming a variable throat centrally located relative to the delivering end of the carburetor, and permittin the mixture to pass in an unbroken or undivided stream to the manifold, instead of being divided by its passage across the axis of the second butterfly valve.

Said plates and holder constitute elements of a structure which is applicable as a unit to the flat face of the carburetor flange b, and forms a flat seat for the manifold flange c, the holder being adapted to enga e the connecting bolts 7, so that after the anges have been separated, the holder may be interposed therebetween and securely confined by the bolts, after the manifold flange isscated on the holder, gas-tight joints being thus formed. The holder is of annular form and is preferably composed of two annular sections 12 and 13, placed side by side. The section 13 has a central orifice 14, forming a bore or passage registering with the bore of the manifold d, as shown by Figure 9. A portion of the inner face of the section 13 forms one side wall of an annular recess, the margin 15 and the opposite side wall 16 of which are formed in the section 12. Said recess communicates with, and is of greater diameter than the bore 14.

In the side wall 16 are formed radial slots 17, one of which is shown by Figure 6. Located in said recess is an annular adjuster 18, adapted to be turned in the recess, the periphery of said adjuster being in sliding contact with the recess margin 15.

I locate in the recess beside the adjuster 18, a plurality of superimposed arcuate oscillatory plates 19, each ivoted at one end at 20, to the adjuster, and having at its free end a stud 21, which is movable in one of the radial slots 17. Said plates collectively form a centrally located variable throat 22 (Figure 2), through which all of the explosive mixture passes to the manifold. When the adjuster 18 is turned, the lates are swung on their pivots 20, and t eir free ends are guided by the slots 17 and studs 21, so that the free ends may be moved simul- IOI t'aneously inward, to contract the throat, as indicated by Figure 2, or simultaneously outward, to enlarge the throat, as indicated by Figure 1. I

I provide adjuster turnlng means, whereby the adjuster 18 may be turned in either direction, said means bein operable by the driver of a motor vehicle, rom any suitable point on the vehicle.

An element of the preferred turnin means is a rockshaft 24, journaled in a fixe bearing 25, on the holder, and provided with a crank-arm 26, which may be turned by a rod 27 Between the rock-shaft 24 and the the adjuster 18 are torque-transmitting conneotions here shown as a gear segment 28 (Figure 4:), meshing with an arcuate series of gear teeth 29 (Figure 5) on the adjuster. The bearing is preferably on a hollow arm 30, fixed to the holder and arranged in a plane at right angles with the latter, the

gear segment 28 being located within the arm, as shown by Figure 3.

It will now be seen that the holder, the throat-forming plates, the adjuster and the adjuster-turning means constitute a structure that is applicable as a unit to an existing carburetor and intake manifold, without change in, or adaptation of said elements, other than the removal of the usual inner butterfly valve. Saidstructure may be installed by first removing the bolts 7, then interposing the holder between the carburetor and manifold flanges, then reinstating the bolts, the holder being provided with orifices 32 (Figure 9), through which the bolts pass, and finally tightening the nuts 9.

I claim:

1. An attachment adapted to be interposed between the outlet of a carburetor and the inlet of an intake manifold of an internal combustion engine, comprising -an annular holder, the bore of which will connect the carburetor outlet and manifold inlet, and a laterally projecting hollow arm at one side of and communicating with said bore, a ser1es of superimposed oscillatory plates arranged within the holder and collectively forming a variable throat, an adjuster connected to said-plates and including an armate series of gear teeth, a rock shaft journalled in a fixed bearing on said hollow arm, and a segmental gear fixed to vsaid shaft within the arm and meshing with the adjuster gear teeth, substantially as and for the purpose described.

2. An attachment adapted to be interposed between the outlet of a carburetor and the in let of an intake manifold of an internal combustion engine, comprising an annular holder, the bore for connecting said outlet and inlet being circumferentially enlarged at the end adjacent the intake manifold and the annular recess thus formed having a series of radial slots in one wall, a series of superimposed oscillatory plates within said recess, the free ends of the plates having studs movable in said radial slots and said plates forming a variable throat, an adjuster within said recess and pivotally connected to each of said plates, an adjuster-turning means including a rock shaft journalled in a fixed bearing on the holder, the holder, the throat forming plates, the adjuster and the turning means const1tuting a unitary structure, substantially as and for the purpose described.

In testimony whereof I have aflixed my signature.

PATRICK J. HALLORAN. 

